This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X650S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI63 Standard Cylinder SI63X650S
The AirTAC Airtac SI63 Standard Cylinder SI63X650S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 650mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X650S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke650 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X650S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI63 Standard Cylinder SI63X650S
The AirTAC SI63X650S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 650mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. AirTAC replaced it with the SAI63X650S, a direct upgrade retaining the exact interface, stroke, and force.
The SAI features an upgraded piston seal with two Y-shaped elements for low start-up pressure. The -S magnet works with legacy CS1-B/DS1-B sensors, while SAI uses current switches.
Airtac SI63 Standard Cylinder SI63X650S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X650S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X650S |
| Bore size | Ø63 mm |
| Stroke | 650 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI63X650S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAI63X650S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI63 Standard Cylinder SI63X650S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×650 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI63 Standard Cylinder SI63X650S Is Used
Pallet Diversion
Routes heavy pallets across transfer lines using the 1559N push force, while the 650mm stroke handles wide lane shifts.
Vertical Lift Gate
Raises and lowers loading bay gates; the 650mm travel provides ample clearance for forklift entry and material flow.
Long-Stroke Ejection
Pushes machined parts clear of a press bed, using the full 650mm extension to ensure parts drop safely into collection bins.
Replacing the Airtac SI63 Standard Cylinder SI63X650S with the SAI63X650S
To replace the SI63X650S, order the SAI63X650S. Confirm the ISO 15552 mounting interface, G3/8 port, M16x1.5 rod thread, and your mounting accessory (LB, FA, TC, etc.). The -S suffix means a magnet is present for CS1-B/DS1-B sensors. Sizing both ways: a 50mm bore gives 982N push, while an 80mm bore gives 2513N at 0.5MPa. At 650mm stroke, use external guides to prevent rod bending and side-load damage. A plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X650S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI63 Standard Cylinder SI63X650S FAQ
Yes, the SI63X650S is discontinued. The direct replacement is the AirTAC SAI63X650S. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 650mm stroke, output force, G3/8 port, and mounting accessories.
The 63mm bore uses a G3/8 port. It generates 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X650S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X650S replacement — usually within 7-8 hours.